JPH0230778Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a chemical analysis slide for chemically analyzing and measuring liquid samples.

[Conventional technology]

Generally, a chemical analysis using a reaction reagent is performed on a liquid sample such as blood or serum when it is necessary to know whether or not a specific component is contained in the liquid sample, or the content thereof. There are two methods for chemical analysis of liquid samples: the dry method and the wet method. Of these, the dry method uses a chemical analysis slide and supplies the liquid sample to be analyzed by dropping it onto the slide. A method in which a liquid sample and a reagent are placed in a thermostatic chamber to react, and the progress or result of the reaction is measured and detected, for example, by measuring the change in color density due to the reaction using an optical density meter or by other means. This is very convenient in that a liquid sample can actually be treated as a solid.

However, conventional chemical analysis slides are
-63452, a chemical analysis film is formed by forming a reagent layer on the upper surface of a transparent support and laminating a developing layer on the upper surface of the reagent layer. Since the chemical analysis film itself was housed in a slide frame composed of first and second mounts each having an opening and a spacer interposed between the two mounts, the chemical analysis film itself
Not only is it a layered structure, but the slide frame that houses it is also made up of three pieces, which not only makes the whole thing thicker, but also increases the number of assembly steps because each component is individually molded and assembled. , which required large-scale equipment, resulting in high costs. On the other hand, in 1983, the slide frame was constructed with two sheets.
No. 142454 has arrived. This consists of a mount with a recess deep enough to fit the chemical analysis film in the center area of the top surface while keeping the bottom surface flat, and a mount cover that supports the chemical analysis film loaded into the recess of the mount. Because it was configured as follows, the following problems arose.

The back of the slide is flat like the top. For this reason, it is difficult to distinguish between the front and the back in terms of shape. Therefore, it became necessary to devise measures such as changing the color of the front and back sides.

In the case where the chemical analyzer is provided with a slide insertion part around the disk, and the slide inserted into the insertion part is slid on a heat retention plate and carried to the sample dropping position and the photometry position,
If the entire back surface of the slide is flat, it will stick tightly to the heat-retaining plate, resulting in poor sliding performance, making it difficult to manage the time from dropping to photometry and other time management.

After inserting the slide from the slide insertion part, it is necessary to bring the chemical analysis film to the required temperature with heat from the heat retention plate before the sample is dropped, but since there is an extra thick part on the back of the slide that absorbs heat, Thermal efficiency is poor and it takes time to heat up.

The recess (concave part) on the top surface of the mount can be formed while keeping the bottom surface flat by molding, bonding, or cutting, but all of these methods require complicated manufacturing steps and are expensive.

Distortion is likely to occur because there is a large difference between the thickness of the entire mount and the thickness of the bottom of the recess.

[Purpose and structure of the idea]

This idea is to solve the above problem, and includes a mount that has a concave constriction part that protrudes downward by the depth to which the chemical analysis film is fitted, in the central area of the top surface, and the mount. By constructing the slide with a mount cover that supports the chemical analysis film loaded in the narrowing section, the number of component parts of the slide can be reduced, and the number of molding and assembly steps can be reduced to provide a chemical analysis slide that can be manufactured at low cost. It is intended to.

Another purpose of this invention is to provide a chemical analysis slide in which the front and back sides of the slide can be clearly distinguished in terms of shape, and there is no distortion by eliminating the difference between the wall thickness of the entire mount and the wall thickness of the bottom of the recess. It is in. Another object of the present invention is to provide a chemical analysis slide in which the time required for sample dropping and photometry can be shortened and the time can be easily managed.

〔Example〕

Next, this invention will be explained based on an embodiment shown in the accompanying drawings.

1 is a mount, 2 is a mount cover, and 3 is a chemical analysis film. Chemical analysis film 3 is the first
As shown in Figure 2, a reagent layer 3b is formed on the upper surface of a transparent support 3a, and a developing layer 3c is laminated on the upper surface of the reagent layer 3b. This spreading layer 3c is for spreading the liquid sample dropped onto it in the surface direction and causing it to react with the reagent layer 3b.

The mount 1 is desirably made by plastic molding from the viewpoint of productivity, operability, cost, etc., and the chemical analysis film 3 is disposed in the central region of the mount 1.
A narrowing section 4 is provided in which the stylus can be loaded. The result is the same whether the narrowed portion 4 is formed by air pressure forming, vacuum forming, or press forming. Further, the mount 1 may be molded from a transparent plastic material;
It may be molded from opaque plastic material. In the former case, the chemical analysis film 3 loaded in the narrowing section 4 can be seen through, so it is not necessary to provide a through hole for photometry at the bottom of the narrowing section 4; however, in the latter case, as shown in the drawing, A condition is to form a transparent film 5 for photometry on the bottom of the film 4. The diameter of the through hole 5 is determined in relation to the irradiation area of the photometric light beam during photometry.

The mount cover 2 is for supporting the chemical analysis film 3 loaded in the constriction part 4 of the mount 1, and is attached to the upper surface of the mount 1 by suitable means (for example, adhesive bonding, ultrasonic welding, etc.). are joined by mechanical bonding, etc.).
The mount cover 2 is provided with a through hole 6 in its central region for dispensing a liquid sample. The diameter of the dispensing through hole 6 is determined in consideration of workability during dispensing, but it goes without saying that it is smaller than the chemical analysis film 3.

Reference numeral 7 denotes a leg member provided on the outer periphery of the lower surface of the mount 1, and the leg member 7 projects an amount l of the narrowing portion 4.
It has a height corresponding to The leg members 7 are for the purpose of making it easier to maintain the mount 1 horizontally when the mount 1 is placed on a measuring table (not shown) or housed in a magazine. It is shown in FIGS. 3 to 6. Third
In the figure, the outer periphery of the mount 1 is folded downward and used as the leg member 7, but there is an advantage that can be obtained easily by molding the constricted portion 4 at the same time as the molding. In FIG. 4, the outer periphery of the mount cover 2 is folded downward to form a leg member 7. In this case, the leg member 7 is the mount 1 and the mount cover 2.
It also functions as a means of joining. In FIG. 5, a through hole 8 is provided on the outer periphery of the mount 1, a projection 9 is provided on the lower surface of the outer periphery of the mount cover 2 passing through the through hole 8, and the projection 9 is used as the leg member 7.
In this case as well, the mount 1 and the mount cover 2 can be joined together. FIG. 6 shows a mold member 10 such as a groove mold or a machining mold on the outer periphery of the mount 1.
This is the case where the leg members 7 are made by fixing them.

[Effect of idea]

As described above, the chemical analysis slide according to this invention has a mount formed with a concave constriction portion that protrudes downward by the depth to which the chemical analysis film is fitted, in the central region of the top surface, and the constriction portion of the mount. Since the slide is made up of two pieces, including a mount cover that supports the chemical analysis film loaded in the slide, there are fewer component parts, which reduces the number of molding and assembly steps, making it possible to provide chemical analysis slides at low cost. It has excellent effects.

In addition, the chemical analysis slide of this invention has the following features: (a) the back surface of the slide has a different shape from the top surface, making it easy to distinguish between the front and back, and (b) when sliding the slide on a heat-retaining plate, the heat-retaining plate does not have a sliding surface. The contact is with a part of the back of the slide, so it does not impair sliding performance and makes it easy to manage time for sample dropping and photometry. (c) There is no extra thick part on the back of the slide that absorbs heat, resulting in good thermal efficiency. , the temperature rise time can be shortened, that is, the photometry processing time can be shortened. (d) Since the recess on the top surface of the mount can be created by drawing, the number of manufacturing steps is small and the product can be provided at low cost. (e) The difference between the thickness of the entire mount and the thickness of the bottom of the recessed portion is zero, no distortion occurs, and the optical position of the chemical analysis film during photometry can always be kept constant.

In addition, in this invention, when a leg member with a height corresponding to the amount of protrusion of the constriction part of the mount is provided on the outer periphery of the bottom surface of the mount, this chemical analysis slide can be used even if the area of the constriction part is small compared to the area of the mount. It is effective for maintaining horizontality when placed on a measuring table or stored in a magazine, and depending on the method of forming the leg members, it can also be used as a means of joining the mount and mount cover. There is.

[Brief explanation of drawings]

The drawings show an embodiment of this invention; FIG. 1 is an exploded perspective view, FIG. 2 is a sectional perspective view, and FIGS. 3 to 6 are sectional perspective views each showing an embodiment of the leg member. 1...Mount, 2...Mount cover, 3...
...Chemical analysis film, 4...Narrowing section, 7...Leg member.

Claims (1)

[Claims for Utility Model Registration] (1) A mount formed with a concave constriction that protrudes downward by the depth to which a chemical analysis film is fitted in the central region of the upper surface, and a concave constriction in the constriction of the mount. A chemical analysis slide comprising a mount cover that supports a loaded chemical analysis film. (2) The chemical analysis slide according to claim 1, wherein a leg member having a height corresponding to the amount of protrusion of the narrowing portion is provided on the outer peripheral portion of the lower surface of the mount. (3) The chemical analysis slide according to claim 2, wherein the leg member is formed by folding the outer periphery of a mount downward. (4) The chemical analysis slide according to claim 2, wherein the leg member is formed by folding the outer periphery of a mount cover downward. (5) The chemical analysis slide according to claim 2, wherein the leg member is a protrusion projecting from the lower surface of the outer periphery of the mount cover so as to pass through a through hole provided in the outer periphery of the mount. (6) The chemical analysis slide according to claim 2, wherein the leg member is a mold member fixed to the outer periphery of the mount.